CNN reports that it will cost New York City more than $1 million (USD) a day to keep Melania Trump and her son Barron safe in Trump Tower.

The cost is also associated with the rest of the Trump family before the presidential handover occurs. However the cost will continue once Donald Trump has moved into the White House and Melania and Barron remain in Trump Tower.

New York residents have taken action by putting forward a petition refusing to pay "over $1million a day just so she [Mrs Trump] can stay”. The petition already has over 100,000 signatures.

“This is a very substantial undertaking. It will take substantial resources,” Mr de Blasio said. “We will begin the conversation with the federal government shortly on reimbursement for the NYPD for some of the costs that we are incurring.”

Though it is not unusual for local police to protect the families of the president-elect and their families, the dense population of the neighbourhood makes it a larger cost than usual.